Belief-valve.



No-880y088. PATENTED FEB. 25, 1908. C. W. MILLER.

RELIEF` VALVE.

APPLIUATION FILED JULYG, 1905.

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CHARLES W. MILLER., OF MILWAUKEE, WISCONSIN.

BE LIEF-VALVE Specification of Lettere atent.

Patented Feb. 25, 1908. A

To allwhom it may Concern.'

Be itkuown that I, CHARLES W. MILLER, a citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful improvements in Relief- Valves; and l do hereby declare that the is a full, clear, and exact description thereof. 1

My invention consists in certain peculiari- -ties of construction and combination oi parte hereinafter particularly set forth with reference to the accompanying drawing and subse uently claimed, its object being Ato provide a valve especially designed foruse 1n hot-Water heating-systems tol maintain a uniform pressure,- the same device being also applicable, in various instances, as a relief-valve.

The drawing represents a vertical sectional view of a valve and its casing in accordance with my. invention, the casing being shown in connection with an expansiomtank and a ing the vcasing-Walls, there being'a semicircularpocket or de pression in the flange for the reception of an ear-extension of the ringportion H of .the flap-valve. This ear-extension is provided with a squared opening into which is fitted a squared section of a rod l, for which said casing is provided with bearings coaxial with the pocket, one end oi the rod projecting through the aforesaid casing for the rece tion of 'an arm K, there being an adjusta le Weight J suspended from the arm adapted to hold the flap-valve to its seat under normal conditions.

An independentlymovable central checkvalve ortion Hx of the flap-valve Lghas Va stem In guided infa hub N connecting spiderarms 0 of said valve. This check ortion'o the valve isl by gravity nnrmally elow the remainder of said valve, 'the distance of its 'descent being regulated by nuts e engaging the screw-threaded end oi the 4stein lli above the hub N aforesaid:

In ractiee, the weight J is adjusted on the arm to hold the {lap-valve L on the seat E in the casing E at a predetermined ressure, and the finiti the pipe G is unabe to unseat said valve until after the independently movable4 cheek-valve portion H thereof 1s closed on its seat, said "closure being eifected by the rise of water in the system'. This inde endently movable check portion of the va ve having closed, the rise of Huid back of the same is stopped until such time as there is sufficient pressure generated to overcome the opposingl valve, as aw Byv the application of the valve to a hotwater heating-system having an expansiontan-k open to atmosphericpressure it is pos sible to obtain' the same results as those or' the usual ressure systems, in the foilowing rnanner: 'l he system being illed with water to the overflow oiening ol; the .expansiontank, the weight i tor example, is adjusted to.

cause the flap-valve L't-oexert a pressure upon its seat il of tenpounds. if the Water is then'heat-ed it will, owing to expansion, endeavor to rise into the expansion-tank,

this will cause the check-valve portion H to seat, thus cutting oil communication between said tank and pipe-system, and as the temperature of lthe water continues to rise water in the pipe below the valve, under ordinary conditions, would contract and leave an air-space between said vaive and the resistance and lift the ilap-l ole, from the seat in its casing.

approxi-Y ASi) water-line, and tooverco'nie this defect the check-valve portion il is arranged 'to openiv gravity or the weight of the water in the tank' above, and thus permit the saine to flow back into the system, thereby always lieepingthesystem filled belour the ex ansion-tank unil maintaining a pressure w en the water is heated.

lelaim:

In a, relief-vailve )rovii'led with a casing having an annuler Y:inged Seat and a senui circular pocket in the annular flanged sont; the combination of u flap-valve eonlprisiw;l :i ring-portion ada ted to lose upon the langed seat, the ring-portion heinel provided with an eer-extension itted into the pocket, a central apertured hub in spider-connection with the ring-portion, a grevityeontrolled cheek-Valve closure for said ring-poriion7 i1 stem for the cheek-Valve in reciproeative engegement with the hub of the'aforesaid ringportion', n roil litted in the ear-extension of i the ring-portion, bearings for the rod in the casing, en arm secured to said rod exterior ofA neetion with the erin.

ln testimonyr that l elaiin the foregoing I have hereunto set my hund at Milwaukee in the county of Milwaukee and State of fiseonsin in the presence of two witnesses.

eHARLES W. MILLER.

iitnesses GEo. W. YOUNG, H. E. OLIPHANT.

seid casing, unil an adjustable weight in con- 20 

